Ariquemes weather in December

In December, Ariquemes sees average daytime highs of 30°C and overnight lows near 23°C, with 246 mm of rain across 26.8 wet days and about 12.6 hours of daylight. It is the 7th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 2% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 30 min at the start of December to 12 h 36 min by month's end. Set against the rest of the year, December is Ariquemes's 9th-clearest and 6th-windiest month. For the whole year in context, see Ariquemes's year-round climate.

Daytime high
30°
7th warmest
Overnight low
23°
10th coldest
Rainfall
246 mm
26.8 wet days
Daylight
12 h 36 min
5:51 AM – 6:26 PM
Cloud cover
86%
9th clearest
Wind
5 km/h
6th windiest
Solar energy
4.78 kWh/m²
Travel score
2.8
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical December day in Ariquemes reaches about 30°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 33°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13123
23123
33123
43123
53123
63123
73123
83123
93123
103123
113123
123123
133123
143123
153123
163123
173123
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023
313023

How December really feels in Ariquemes

Once humidity and wind are folded in, December averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Ariquemes weather by month

How December compares with the rest of the year at a glance. December is the 7th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°28227.612.52.8
Feb30° / 23°2792612.32.7
Mar30° / 23°27428.212.12.7
Apr30° / 23°18523.811.83.1
May30° / 22°9115.811.64.1
Jun32° / 21°204.411.44.9
Jul33° / 21°132.511.54.3
Aug34° / 21°325.411.73.3
Sep34° / 23°861411.92.8
Oct33° / 23°14220.212.22.7
Nov31° / 23°20823.212.52.8
Dec30° / 23°24626.812.62.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 6% of December, with mostly cloudy or overcast conditions the remaining 91%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1793
2793
3793
4793
5793
6892
7991
8991
9991
10991
111090
121090
131090
141090
151090
161090
171090
181090
19991
20991
21991
22991
23892
24892
25892
26793
27793
28793
29595
30595
31595

Chance of precipitation in December

Any precipitation

Ariquemes gets around 246 mm of rain over 26.8 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 86% and peaks near 90% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
184
284
385
485
585
685
785
885
984
1084
1184
1285
1385
1485
1585
1685
1786
1886
1986
2087
2187
2287
2388
2488
2588
2689
2789
2889
2989
3089
3190

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the oppressive band about 81% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
107624
207624
307624
407624
507624
607624
707624
807723
907723
1007723
1107822
1207822
1307921
1408020
1518019
1618118
1718217
1818217
1918316
2018415
2118415
2218514
2308614
2408614
2508713
2608713
2708713
2808713
2908614
3008614
3108515

Wind in December

Winds average 5 km/h in December.

Across December, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 30 min at the start of December to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 5:46 AM to 5:58 AM, and sunset from 6:18 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:466:18
212.55:466:19
312.55:466:19
412.55:476:20
512.65:476:20
612.65:476:21
712.65:486:21
812.65:486:22
912.65:486:22
1012.65:496:23
1112.65:496:23
1212.65:496:24
1312.65:506:24
1412.65:506:25
1512.65:516:25
1612.65:516:26
1712.65:516:26
1812.65:526:27
1912.65:526:27
2012.65:536:28
2112.65:536:28
2212.65:546:29
2312.65:546:29
2412.65:556:29
2512.65:556:30
2612.65:566:30
2712.65:566:31
2812.65:576:31
2912.65:576:32
3012.65:586:32
3112.65:586:32

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.78 kWh/m².

For context, solar energy here swings from a low near 4.4 kWh/m² to a high of 5.6 kWh/m² in October across the year — December's 4.78 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in December

Hazard calendar for Ariquemes

In seasonPeak

In December, Ariquemes sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Ariquemes's rainy season runs October–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Ariquemes?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.8
Sightseeing
6th-best month of the year
4.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Ariquemes.

What to pack for Ariquemes in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Ariquemes sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

UV index in Ariquemes in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ariquemes peaks around March 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 13 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeMar 10UV 15Sep 13UV 3
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug6High
Sep3Moderate
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Ariquemes in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Ariquemes is worst in September — around 101 µg/m³ PM2.5 (unhealthy), about 10.3× the cleanest month (May, 10 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateUnhealthyModerateSep 1496 µg/m³May 1710 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb12Moderate
Mar14Moderate
Apr11Good
May10Good
Jun11Good
Jul15Moderate
Aug68Unhealthy
Sep101Unhealthy
Oct41Poor
Nov21Moderate
Dec15Moderate
Location & terrain

Where is Ariquemes?

Ariquemes sits at 9.9°S, 63.0°W, 139 m above sea level, in Brazil. The nearest listed city is Alto Paraíso, 36 km away.

Topography around Ariquemes

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ariquemes.

Within 3 km, the terrain around Ariquemes has only modest variations in elevation — a maximum elevation change of 148 m around an average of 132 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 197 m; within 80 km, significant variations in elevation — a maximum elevation change of 443 m.

The land around Ariquemes is covered by artificial surfaces (56%), grassland (21%) and trees (20%) within 3 km, grassland (52%) and trees (41%) within 16 km, and grassland (56%) and trees (42%) within 80 km.

3 km
148 m
16 km
197 m
80 km
443 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Alto Paraíso 36 km · Jaru 86 km · Buritis 92 km · Machadinho d'Oeste 127 km · Ouro Preto do Oeste 129 km · Candeias do Jamari 142 km · Porto Velho 159 km · Ji Paraná 161 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Ariquemes (-9.9133°, -63.0408°, elevation 139 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).